Electron energy can oscillate near a crystal dislocation
Abstract
Crystal dislocations govern the plastic mechanical properties of materials but also affect the electrical and optical properties. However, a fundamental and quantitative quantum field theory of a dislocation has remained undiscovered for decades. Here in this article we present an exactly-solvable one-dimensional quantum field theory of a dislocation, for both edge and screw dislocations in an isotropic medium, by introducing a new quasiparticle which we have called the ‘dislon’. The electron-dislocation relaxation time can then be studied directly from the electron self-energy calculation, which is reducible to classical results. In addition, we predict that the electron energy will experience an oscillation pattern near a dislocation. Compared with the electron density’s Friedel oscillation, such an oscillation is intrinsically different since it exists even with only single electron is present. With our approach, the effect of dislocations on materials’ non-mechanical properties can be studied at a full quantum field theoretical level.
- Authors:
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Defense Advanced Research Projects Agency (DARPA)
- OSTI Identifier:
- 1341259
- Alternate Identifier(s):
- OSTI ID: 1341260; OSTI ID: 1366537
- Grant/Contract Number:
- SC0001299; FG02-09ER46577
- Resource Type:
- Published Article
- Journal Name:
- New Journal of Physics
- Additional Journal Information:
- Journal Name: New Journal of Physics Journal Volume: 19 Journal Issue: 1; Journal ID: ISSN 1367-2630
- Publisher:
- IOP Publishing
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; quantum field theory; crystal dislocation; Friedel oscillation; disordered system
Citation Formats
Li, Mingda, Cui, Wenping, Dresselhaus, Mildred S., and Chen, Gang. Electron energy can oscillate near a crystal dislocation. United Kingdom: N. p., 2017.
Web. doi:10.1088/1367-2630/aa5710.
Li, Mingda, Cui, Wenping, Dresselhaus, Mildred S., & Chen, Gang. Electron energy can oscillate near a crystal dislocation. United Kingdom. https://doi.org/10.1088/1367-2630/aa5710
Li, Mingda, Cui, Wenping, Dresselhaus, Mildred S., and Chen, Gang. Sun .
"Electron energy can oscillate near a crystal dislocation". United Kingdom. https://doi.org/10.1088/1367-2630/aa5710.
@article{osti_1341259,
title = {Electron energy can oscillate near a crystal dislocation},
author = {Li, Mingda and Cui, Wenping and Dresselhaus, Mildred S. and Chen, Gang},
abstractNote = {Crystal dislocations govern the plastic mechanical properties of materials but also affect the electrical and optical properties. However, a fundamental and quantitative quantum field theory of a dislocation has remained undiscovered for decades. Here in this article we present an exactly-solvable one-dimensional quantum field theory of a dislocation, for both edge and screw dislocations in an isotropic medium, by introducing a new quasiparticle which we have called the ‘dislon’. The electron-dislocation relaxation time can then be studied directly from the electron self-energy calculation, which is reducible to classical results. In addition, we predict that the electron energy will experience an oscillation pattern near a dislocation. Compared with the electron density’s Friedel oscillation, such an oscillation is intrinsically different since it exists even with only single electron is present. With our approach, the effect of dislocations on materials’ non-mechanical properties can be studied at a full quantum field theoretical level.},
doi = {10.1088/1367-2630/aa5710},
journal = {New Journal of Physics},
number = 1,
volume = 19,
place = {United Kingdom},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}
https://doi.org/10.1088/1367-2630/aa5710
Figures / Tables:
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Figures / Tables found in this record: